Piston.



A. B. EDDOWES.

' PISTON.

APPLICATION FILED AUG.24, I916.

1,21 6,21 s. Patented Feb. 13,1917.

ARCHIBALD B, nnnowns, or" r'nI Ann PnIA,

LENNSYLVANIA", ASSIQNOR TO THE BALDWIN LOCOMOTIVE WORKSQOF PHILADELPHIA,PENNSYLVANIA, A CORPORAT- 'IION or PENNSYLVANIA,

PISTON.

specification of Letters Patent.

Patented Feb. 13, 191".

Application filed August 24, 1916. Serial No. 116,653.

To all whom it may concern:

Be it known that I, ARCHIBALD B. Ennowns, a citizen of the UnitedStates, residing in Philadelphia, Pennsylvania, have inventedcertainImprovements in Pistons, of which the following is aspecification.

The object of my invention is to securely fasten a bull ring to a pistonof a steam or other engine. r

In the accompanying drawing Figure 1, is a transverse sectional view ofa piston, illustrating my invention, on the line 11, Fig. 2;

Fig. 2, is a face view of the piston;

Fig. 3, is an enlarged view of a portion of Fig. 1;

Figs. 4, 5 and 6, are views illustrating a modification of theinvention; and

Fig. 7, is a View illustrating another modification of the invention.

Referring to the drawing, 1 is the body or the center of the piston, inthe present instance made of steel either cast, rolled or forged, and 2is the bull ring adapted to the periphery of the center and this ringmay be made of cast iron, or other suitable material.

On one edge of the center is an ann lar flange 3 shaped to tit anannular recess in the bull ring 2. The opposite edge of the center has adiagonal groove 4 therein and the ring is beveled on a line with theWalls of this groove, as at 5. 6 an annular ri g which is adapted to arecess 4 and res s against the beveled portion of the bull ring forminga flange so that the bull ring is pre vented from moving independentlyof the center by the fixed flange 3 on one side and the locking ring onthe opposite side. The ring is a split ring and is forced in position asillustrated in Fig. 1, and, when in this position, the two ends arewelded together. The ring is also preferably welded at 7 {to the center,making a rigid fastenin 'llhe bull ring has the ordinary annular groovesfor the packing rings.

I n some instances, I may use the const uction illustrated in Fig. 7, inwhich the fia; ge- 3" is undercut and is adapted to fit the'undercutportion 8 of the bull ring 2*, while at the'opposite side there is anundercut portion 9 on the bull ring and a ring 6 is adapted to fit inthis portion of the bull ring and is extended into an annular groove 4?in the center 1. In order to retain this ring in position, I provideanother annular looking ring 6, which is sprung into position. back ofthe ring 6.

welded to the ring 6" at 7. Either one of the rings (Sfor 6" may be madeof a single piece, if found desirable.

In Figs. 4, 5 and 6 is illustrated a further modification in which aring 6 is used having an.annular tongue 6". The ring is adapted to anannular recess 5 in the bull ring 2, while the tongue is adapted to anannular recess in the center 1, and, when the two parts are assembled,the ring can be forced into position, as in Fig. 4:. I make the abuttingends of this ring. as illustrated in Fig. 6, one beveled end of the ringoverlapping the other and one of the ends forms; a recess so that theparts can be Welded, as at 7 In some instances, in addition to thelocking ring, one or more pins 10 may be used to retain the two parts inposition.

By this construction, I am enabled to firnilvsecure the bull ring to thecenter, the ring being held on one side by an annular flange formedintegral with the center, while at the opposite side an annular flangeis formed by the locking ring, which is firmly held in position. Nobolts, or other devices, are used which project beyond the piston,making a very compact and simple piston construction.

I olaim:-

l. The combination in a piston, of a center having an annular flange atone edge and having an annular groove at the opposite edge; a bull ringmounted on the piston and having an annular groove alining with thegroove in the center; and a locking ring adapted to both grooves. I

2. The combination in a piston, of a center having an annular flange atone edge and having an annular groove at the opposite edge; a.bull ringmounted on the pisten and having an annular groove alining 100 The twoends of the ring are welded together'and the ring 6 is with the groovein the center; a looking to receive the umullr flu of the center ringadapted to both grooves; and means and beveled on {line W1 11 theInclined for securing he locking ring to the center. groove; and alocking hated to the l0 '3. The combination in a plston, of a oengrooveand exten mm 0 beveled 5 ter having an annular flange at one e endportion of the bull ring, curing the bull having a diagonal, annulargroove at t e opring firmly to the center. posite edge a. bull ringrecessed at one edge ARCHIBALD B. EDDOWEB.

